Ventilator



W. W. MOHEY.

VENTILATOR. APPLICATION FILED AUG28| i919.

Patented De@.14,1920.

UNITED STATES PATENT OFFICE.

WORTHIE W. MOREY, F CGLUMBUS, OHIO, ASSIGNOR TO F. 0. SCHOEDINGER, 0F COLUMBUS, OHIO.

VENTILATOR.

Specification of Letters Patent.

Patented Dec. 14. 1920.

To all whom t may concern:

Be it known that I, Won'rI-irn W. Mourir, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Ventilatore, of which the following is a specification.

This invention relates broadly to ventilators and has particular reference to a ventilator wherein is embodied improved features of construction for insuring an effective draft therethrough and to render such draft substantially uniform by adapting the ventilator to prevailing weather conditions.

Another object of the invention rests in the provision of a ventilator wherein is embodied a rotatable hood and in the provision of a superimposed air passageway within said hood and above the main passageway thereof, said upper passageway having an open rear face which is adapted to be eX- posed to the wind and by this construction to direct a flow of air through said superimposed passageway and out of the open end thereof, s0 that an induced flow of the vitiated air will be set up within the main passageway of the hood.

A further object of the invention resides in constructing the auxiliary superimposed passageway with a substantially enlarged inlet end and a somewhat reduced outlet end, said restricted outlet end serving to maintain the velocity of wind flow through the auxiliary passageway and to thus render the suction created within the main passageway by the escape of air through said outlet end strong and effective.

A further object of the invention rests in the provision of a pivoted wall between the main passageway of the hood and the auxiliary passageway, said wall being capable of assuming positions obstructing the flow of air through the main passageway of the hood so that a back flow of the elements will be prevented within the hood, and to further render said wall adjustable by means of spring tension s0 that the restricted outlet mouth of the auxiliary passageway maybe fl enlarged or decreased in area in proportion to the velocity of air passing therethrough, thus assisting in preserving a suction of uniform effectiveness at the discharge end of the hood.

tion, reference is to be had to the following .description and to the accompanying drawing, in which- Figure l is a vertical sectional view taken through a ventilator constructed in accordance with the principles of the invention,

Fig. 2 is a front elevation thereof,

Fig. 3 is a rear elevation.

Fig. 4 is a detail fragmentary perspective view of the sliding closure plate withV pivoted wall member, and

Fig. 5 is a detail view illustrating the manner of connecting the outer end of said pivoted wall member with its supporting cable.

Referring more particularly to the details of the invention the ventilator A comprising the present invention consists of a rigid iiue or stem l adapted to be carried in any suitable manner by a building structure and to be in communication with the interior of such structure so that foul or vitiated air contained therein may be exhausted by way of the flue l. In order to cover the upper end of the flue and to prevent a back draft therethrough, use is made of a rotatable hood member 2. rihis hood member is preferably mounted for rotation in connection with the flue by providing the latter at its upper end with spaced spiders 3 and 4 which are formed to embody axial hubs 5. Passing through alined openings formed in said hubs is a tube 6 to which is secured in any suitable manner the hood member 2. Said tube in this instance is formed with a nut or collar which rests upon the hub 5 of the lower spider 3, and this hub is provided with an annular fiange 8, which is adapted to seat within an annular recess 9 formed in said collar. By virtue of this construction the weight 0f the hood is received by said lower spider and further, said hood is supported for guided rotation, the hub of the upper spider l serving to augment this feature.

vThe hood member 2 is substantially of rectangular crosssectional formation and isformed to embody a depending neck portion 10 which is designed to surround the upper end of the flue l and guides the vitiated air passing from said iue into the main passageway 1l of the hood. Formed in line with the back portion of said flue is an upwardly directed stationary wall 12 and pivotally secured contiguous to the upper end of the wall 12 is a movable Wall member Y flow of vitiated air through the passageway Above the walls 12 and 13 is a superposed `or auxiliary passageway 15 which is provided with a rear inclined portion 1G, which terminates rearwardly in a substantially open mouth 17, and a weather' vane 18 is mounted upon the upper side of said hood and by its presence serves to maintain the mouth 17 Windward. Braces 19 may be employed for the purpose of retaining the vane 18 in a rigid position. The auxiliary passageway terminates in a forwardly disposed discharge portion 20 which is situated between the upper side of the hood and a movable wall member 13, and it will be observed that normally the discharge mouth of the auxiliary passageway is of a restricted area or of an area less than that of the inlet end of said auxiliary passageway. Thus, the velocity of the wind passing through the passageway 15 is maintained at its discharge mouth inasmuch as the loss in velocity incurred byl the passage of the wind through the passageway is compensated for by the restricted or nozzle like outlet mouth 20. lt will be observed that by rendering the wall member 13 flat transversely, the air passing through the auxiliary passageway will escape from the latter in a thin, high pressure and flat stream and in contiguous relation with the discharge end of the main passageway. This flow of air through the auxiliary passageway sets up an induced iiow of air through the main passageway and results in a positive and forced ejection of the vitiated air from the ventilator.

Also, it will be observed that the air streamsl ously, by flattening the wall member 13 the suction created will act over a very wide area so that all of the vitiated air will be withdrawn. It will thus be apparent that the flat formation of the passageways presents a decided advantage over oval or other curved forms.

Under certain circumstances it has been found advisable to lower the wall member 13 so that the samel willl be enabledy to substantially obstruct the passageway 11 and to thereby positively prevent baclrdrafts through the flue 1. To this end, thev outer edge of said wall member is connected with a flexible cable 21 which is arranged to pass over a pulley 22 located within the auxiliary passageway 15, said cable is then extended so as to pass through an opening 23 formed in the supporting tube 6, and is passed downwardly through said tube and thence through the flue 1 to an accessible part of the building structure. By being suitably held, said cable being normally serve to support the wall member 13 in its norinal elevated position and in this manner will maintain the desired relationship between the passageways 11 and 15. However, upon releasing the lower end of the cable 21 from its retaining element, the wall member 13 will gravitate tothe closed position indicated by dotted line in Fig. 1, thus obstructing a back draft through the iiue 1.

Preferably T provide a spring 24: between the upper end of the cable 21 and the outer edge of' the wall member 13. This spring serves to automatically control the area of the discharge mouth 20 of the auxiliary passageway 15, since if a severe wind pressure is set up within said auxiliary passageway, said wall member 13 will be forced to oscillate by the wind pressure thereon so that the discharge mouth 2O will be open against the tension exercised bythe spring 241. By thus enlarging the open mouth 2O of said auxiliary passageway the increased velocity in wind pressure is taken care of, and the suction created by the same within the main passageway 11 will be substantially 'uniform irrespective of wlind velocity.

The pivoted wall member 13 is formed with an elongatedy slot 25 for the reception of the tube 6 so that the wall member may oscillate without interference on part of said tube. However, in order to close the slot 25 irrespective of the positions the wall member 13 may assume, said latter is provided with ixed guides 26 on its upper surface and in which guides there is positioned a slidable plate 27 which is carried by the tube 6. Obviously, upon the pivotal movement of the wall'member 13, said plate 27 will maintain its fixed position surrounding the tube 6 and yet, said plate is of suflicient length to cover the slot 25 at any position the latter may assume when the wall member 13 is oscillated. Thus the plate 27 serves to prevent vitiated airl flowing through the passageway 11 from gaining access into the auxiliary passageway 15, and thus the flow of air through both passageways is rendered positive by a complete abof substantially curved formation and protects said hinge from the weather.

It will thus be apparent that thereis provided a structure carrying out the objects of the invention and one wherein all of the advantageous features above mentioned are, among others, present. The ventilator is so constructed as to be practically automatic in operation and readily accommodates itself to changes in wind pressure. By the arrangement of the passageways described a positive and forced flow of foul air from the ventilator is provided and through the provision of the spring 24. the suction afforded is of a substantially constant and uniform nature. The movable wall member 13 mayl have its positions readily controlled by the provision of the cable 21 and by use of the plate 27 the passageways will be maintained at all times out of communication with each other.

It will be manifest that by slidably mounting the plate 27 within its guides 26, the wall member 13 will be permitted to 'freely oscillate with respect to the tube 6. The slot 25 in the wall member designed for the reception of the tube 6 is therefore at all times covered by the sliding plate 27 and in this manner eddy currents or undue drafts within the ventilator are prevented.

y'What I claim is:

l. In a ventilator, a stem, a journal support arising substantially axially from said stein, an open sided hood rotatably mount ed for movement relative to said stem by means of said support, a damper hinged within said hood, said damper being formed with an opening through which said support passes, and a plate received by said support and slidably mounted in guides carried by said damper, said plate thereby operating to cover said opening irrespective of the operative positions -of said damper.

2. In a ventilator, a fixed stem, a support journaled in said stem and' arising axially from thelatter, a hood rotatably mounted relative to said stem through the medium of said support, an adjustable damper member pivotally mounted within said hood, the pivot of said member being located inwardly of the hoo'd and to one side of said support, an opening being provided in said member to permit the latter to receive and oscillate relative to said support, and a sliding plate mounted for movement in fixed guides carried by said damper member and formed to receive said support, said plate operating to close said opening irrespective of the operating positions of the damper member within said hood.

3. In a ventilator, a stationary stem, a support projecting above said stem and eX tending axially thereof, an open sided hood rotatable about said support, a movable damper positioned within said hood and serving to divide the latter into main and draft passageways, said member being hinged at a position inwardly of the support and centrally apertured to receive the latter, the main passageway being situated to transmit air arising from said stem and to discharge the same through the open side of the hood, said draft passageway being disposed above said main passageway and open at both ends to effect a forced circulation of air through said main passageway, and a closure member carried by said damper and positioned around said support, said closure member operating to close the support receiving aperture in said damper irrespective of the operative positions of the latter within said hood and to thereby render said passageways out of communication with each other.

In testimony whereof I aiiix my signature.

woarriin w. Moinr. 

